diff --git a/apps/workflowengine/lib/Migration/Version2000Date20190808074233.php b/apps/workflowengine/lib/Migration/Version2000Date20190808074233.php
index fae4fda5bc349..414b0455ba388 100644
--- a/apps/workflowengine/lib/Migration/Version2000Date20190808074233.php
+++ b/apps/workflowengine/lib/Migration/Version2000Date20190808074233.php
@@ -116,7 +116,7 @@ protected function ensureEntityColumns(Table $table) {
 			$table->addColumn('entity', Types::STRING, [
 				'notnull' => true,
 				'length' => 256,
-				'default' => '',
+				'default' => ' ',
 			]);
 		}
 		if (!$table->hasColumn('events')) {